 Over 160,000 inhabitants lives in the urban section of Topčiderka.As a result of high density of population and sewage systems, industrial zones the river passes through and advanced erosion, Topčiderka is notoriously highly polluted, which resulted in City government's 2007 Study on cleaning the river and its drainage basin, which was officially presented in May 2008.The study is the first ever complete collection of measures for Topčiderka improvement.